20312443642056 has 32 divisors (see below), whose sum is σ = 50782861375200. Its totient is φ = 6770580911360.

The previous prime is 20312443642031. The next prime is 20312443642091. The reversal of 20312443642056 is 65024634421302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20312443641999 and 20312443642017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13891530 + ... + 15283961.

It is an arithmetic number, because the mean of its divisors is an integer number (1586964417975).

Almost surely, 2^{20312443642056} is an apocalyptic number.

It is an amenable number.

20312443642056 is an abundant number, since it is smaller than the sum of its proper divisors (30470417733144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20312443642056 is a wasteful number, since it uses less digits than its factorization.

20312443642056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29204509 (or 29204505 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 20312443642056 in words is "twenty trillion, three hundred twelve billion, four hundred forty-three million, six hundred forty-two thousand, fifty-six".